Friedrich zinzen



(No Model.)

P. ZINZEN.

DRILLING MACHINE. No. 544,495. Patented Aug. 13,1895.

NITED STATES FRIEDRICH ZINZEN, OF DI ITSSELDORF, GERMANY.

,srserrrcrmou forming part of Letters r Application filed June 30, 1894.

To all whom it may concern:

Be it known that I, FRIEDRICH ZINZEN, a subject of the German Emperor,residing at Dusseldorf, Germany, have invented certain new and usefulImprovements in Boring-Machines, with description as follows.

This invention relates to a boring machine, and more particularly to themeans for radially adjusting a series of spindle-carriers upon thespindle-head.

In the accompanying drawings, Figure 1 is a sectional elevation of themachine; Fig. 2, a cross-section on line mm, Fig. 1, and Fig. 3, avertical section on line y y, Fig. 1

The letter A represents the frame of the machine, which is provided withthe jointed boring-shafts B; that receive their rotary motion from thework-shaft in suitable manner. To the lower ends of the shafts B thereare coupled the angular spindle-carriers f, having a horizontal and avertical arm;

g is a ring which contains a circular groove n in its upper face,adapted for the reception ofscrews d, that serve to attach thespindlecarriers to the ring. The upright arms of the spindle-carriersreceive the boring-spindles, while the flat horizontal arms are providedwith long slots t, through which the screws d pass. In order to permitthe spindles to be set nearer to or farther away from the center of thespindle-head, each of the slots t contains a horizontal screw (1',whichrpasses with its thread through the screw 01. The ring 9 is dividedby a series of radial grooves n", while similar grooves n are formed inthe lower face of the carriers f. If the grooves 71/ n DRILLING-MACHINE.

atnt no. 544,495, dated August 13, 1895.

Seria1No.516,198. on model.)

are brought into alignment and connected by a common feather s, anaccurate radial guide for the boring-spindles is obtained. I

In order to set the. carriers to the exact diameter of the circledesired, each spindle-carrier is provided with a scale m, operating inconjunction with a circular mark q, that constitutes the pointer. Theradial guidance of the spindle-carriers may be accomplished in differentmanner, if desired.

1 disclaim in a multiple drill the combination, with the drill-carryingspindles and flexible shafts for driving the same, of an open frame andinwardly-projecting bracket-supports for the drill-carrying spindles,adj ustably connected with said frame.

What I claim is--- 1. The combination of a series of angular groovedspindle carriers with a ring having a circular groove and a set ofradial grooves and with screws 01 engaging the circular- FRIEDRICHZINZEN.

Witnesses Ron. LIEBER, WM. EssENwEIN.

